There are two reasons why ovulation test paper has been weakly positive during the ovulation period, which are as follows: 1. It may be that the ovulation test paper has passed the ovulation period when the test is carried out, so at this time it may always show a weakly positive situation. 2. There has been no ovulation or impending ovulation in the process of the test, and therefore a weakly positive test will appear when the test is carried out. Under normal circumstances, if ovulation begins, the ovulation test paper will show a strong positive, and the ovulation period is about three days. You can choose to use ovulation test paper to test, with the passage of time will first appear weak positive, and then will slowly become strong positive, after the strong positive will slowly become weak positive, and finally will become negative. If there is no change in the ovulation test during the test, it is considered abnormal and it is best to change the test method.